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3 years ago

M-5=49 please answer I need help

Mathematics

2 answers:

torisob [31]3 years ago

7 0

M = 54 bro bro bro give me BRANLIEST

Gemiola [76]3 years ago

4 0

Answer:

M=54

Step-by-step explanation:

If you are trying to find the value of M, you add 5 to both sides

M-5+5=49+5

this way the M is all by itself on the left side of the equal sign because -5+5=0

when we combine the like terms we get

M+0=54

therefore M=54

Also 54-5=49

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2 years ago

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The sum of two numbers is 9.9, and the sum of the squares of the numbers is 53.21. What are the numbers?

Snezhnost [94]

Answer:

There are two possibilities:

$x_{1} = 3.5$ and $y_{1} = 6.4$

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Step-by-step explanation:

Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:

$x + y = 9.9$

$x^{2} + y^{2} = 53.21$

First, $x$ is cleared in the first equation:

$x = 9.9 - y$

Now, the variable is substituted in the second one:

$(9.9-y)^{2} + y^{2} = 53.21$

And some algebra is done in order to simplify the expression:

$98.01-19.8\cdot y +2\cdot y^{2} = 53.21$

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Roots are found by means of the General Equation for Second-Order Polynomials:

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$y = y_{1}$

$x_{1} = 9.9-6.4$

$x_{1} = 3.5$

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$x_{2} = 9.9 - 3.5$

$x_{2} = 6.4$

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3 years ago

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Tcecarenko [31]

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